tkinter menuitem question

[Matthew Dixon Cowles]

On 20 Mar 2002 14:24:33 +0000, Ken Guest <kwg at renre-europe.com> wrote:

Dear Ken,

>ok, I might be way off here but is there a way with a collection of
>Tkinter menuitems that all have their callbacks set to be the one
>function to determine which menuitem was clicked on?

Yes, you can do that by storing the state in an object that has
a __call__ method. I'll append a small example.

Regards,
Matt



from Tkinter import *

class genericCBO:
  def __init__(self,func,*positionArgs,**kwArgs):
    self.func=func
    self.positionArgs=positionArgs
    self.kwArgs=kwArgs
    return None

  def __call__(self):
    return apply(self.func,self.positionArgs,self.kwArgs)
    return None

class mainWin:
  def __init__(self,root):
    self.root=root
    self.createWidgets()
    return None

  def createWidgets(self):
    menubar=Menu(self.root)
    myMenu=Menu(menubar)
    myMenu.add_command(label="Option 1",command=genericCBO(self.menuCB,1))
    myMenu.add_command(label="Option 2",command=genericCBO(self.menuCB,2))
    menubar.add_cascade(label="Menu",menu=myMenu)
    self.root.config(menu=menubar)
    return None
    
  def menuCB(self,index):
    print index
    return None

def main():
  root=Tk()
  mainWin(root)
  root.mainloop()
  return None

if __name__=='__main__':
  main()